Filtering and purifying system

Abstract

In a filtering and purifying system, bacteria in raw water are sterilized efficiently with ultraviolet rays, chemicals and the like at a pretreating step. The number of microorganisms such as bacteria remaining in the treated water is reduced remarkably, and the residue of plankton and organic substances as nutrients for bacteria in treated water is reduced by a coagulating and filtering treatment. It is thus possible to solve a problem that the treated water is deteriorated with time due to propagation of the bacteria.

1 . A filtering and purifying system comprising: 
 a production means for producing a product by coagulating matter to be removed in a fluid to be treated, chemically catching and bonding the matter;    a filtering means having an opening size through which the product provided by the production means at a size larger than that of the matter can not pass; and    a treating means provided in said production means for at least sterilizing or oxidizing the matter to be removed in the fluid to be treated.    
     
     
         2 . A filtering and purifying system comprising: 
 a fluid storing means for storing a fluid to be treated, a production means for producing a product by coagulating matter to be removed in the fluid to be treated, chemically catching and bonding the matter;    a filtering means having an opening size through which the product provided by the production means at a size larger than that of the matter can not pass; and    a treating means provided in said fluid storing means for at least sterilizing or oxidizing the matter to be removed in the fluid to be treated.    
     
     
         3 . A filtering and purifying system comprising: 
 a production means for producing a product by coagulating matter to be removed in a fluid to be treated, chemically catching and bonding the matter;    a filtering means having an opening size through which the product provided by the production means at a size larger than that of the matter can not pass;    a treated-water storing means for storing treated water filtered by the filtering means; and    a treating means provided in said treated-water storing means for at least sterilizing or oxidizing the matter to be removed in the fluid to be treated.    
     
     
         4 . A filtering and purifying system comprising: 
 a production means for producing a product by coagulating matter to be removed in a fluid to be treated, chemically catching and bonding the matter;    a filtering means having an opening size through which the product provided by the production means at a size larger than that of the matter can not pass;    a fluid stirring means for stirring the fluid to be treated is provided in said production means; and    a treating means provided in said fluid stirring means for at least sterilizing or oxidizing the matter to be removed in the fluid to be treated.    
     
     
         5 . A filtering and purifying system comprising: 
 a production means for producing a product by coagulating matter to be removed in a fluid to be treated, chemically catching and bonding the matter;    a filtering means having an opening size through which the product provided by the production means at a size larger than that of the matter can not pass;    a plurality of treating means for at least sterilizing or oxidizing the matter to be removed in the fluid to be treated;    a restoring means for restoring reduced sterilizing or oxidizing functions of the treating means;    said plurality of treating means and said restoring means being provided in said production means; and    at least one or more of said plurality of treating means with the sterilizing or oxidizing functions restored functioning continuously during purifying operation.